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Periodic Table Element Comparison: Compare Elements - Fluorine vs Selenium

Compare Fluorine and Selenium

Compare Fluorine and Selenium on the basis of their properties, attributes and periodic table facts. Compare elements on more than 90 properties. All the elements of similar categories show a lot of similarities and differences in their chemical, atomic, physical properties and uses. These similarities and dissimilarities should be known while we study periodic table elements. You can study the detailed comparison between Fluorine vs Selenium with most reliable information about their properties, attributes, facts, uses etc. You can compare F vs Se on more than 90 properties like electronegativity , oxidation state, atomic shells, orbital structure, Electronaffinity, physical states, electrical conductivity and many more.

Facts

Fluorine
9
F
18.9984032
Gas
Colorless
halogens
17
fluorine family 
2
p
[He] 2s2 2p5
-219.6 °C
-188.12 °C
2, 7
CAS7782-41-4
Neighborhood Elements of Fluorine
Selenium
34
Se
78.96
Solid
Gray
other nonmetal
16
oxygen family 
4
p
[Ar] 3d10 4s2 4p4
221 °C
685 °C
2, 8, 18, 6
CAS7782-49-2
Neighborhood Elements of Selenium

History

History
The element Fluorine was discovered by André-Marie Ampère in year 1886 in France. Fluorine derived its name from from the Latin fluere, meaning 'to flow'
The element Selenium was discovered by Jöns Jakob Berzelius in year 1817 in Sweden. Selenium derived its name derived its name from from the Greek selene, meaning 'moon'

Presence: Abundance in Nature and Around Us

Ppb by weight (1ppb =10^-7 %)
4e-07
5e-07
8.7e-05
0.00054
1.3e-06
3.7e-05
3×10-6%
N/A
1.3e-05
5×10-6%
4.5×10-8%
5×10-6%

Crystal Structure and Atomic Structure

42 pm
11.201888679245 cm3
71 pm
147 pm
0.0096
fluorine Spectrum
550, 328, 728 pm
π/2, π/2, π/2
C12/c1
15

Base Centered Monoclinic

fluorine Crystal Structure
103 pm
16.385142145673 cm3
116 pm
190 pm
11.7
selenium Spectrum
905.4, 908.3, 1160.1 pm
π/2, 1.58493, π/2
P121/c1
14

Simple Monoclinic

selenium Crystal Structure

Atomic and Orbital Properties

Atomic Number
Number of Electrons (with no charge)
Number of Protons
Mass Number
Number of Neutrons
Shell structure (Electrons per energy level)
Electron Configuration
Valence Electrons
Oxidation State
Atomic Term Symbol (Quantum Numbers)
Shell structure
9
9
9
18.9984032
9.9984032
2, 7
[He] 2s2 2p5
2s2 2p5
-1  
2P3/2
fluorine Shells
34
34
34
78.96
44.96
2, 8, 18, 6
[Ar] 3d10 4s2 4p4
4s2 4p4
-2;-1  1;2;3;4;5;6
3P2
selenium Shells

Isotopes - Nuclear Properties

Isotopes
Naturally occurring stable isotopes:
19F.
Naturally occurring stable isotopes:
74Se, 76Se, 77Se, 78Se, 80Se.

Chemical Properties: Ionization Energies and electron affinity

1
3.98
328 kJ/mol
1681, 3374.2, 6050.4, 8407.7, 11022.7, 15164.1, 17868, 92038.1, 106434.3 kJ/mol
6
2.55
195 kJ/mol
941, 2045, 2973.7, 4144, 6590, 7880, 14990 kJ/mol

Physical Properties

1.696 g/l
11.201888679245

 

N/A
N/A
N/A
N/A


 

N/A
N/A
N/A

 

N/A
N/A
N/A

 

0.0277 W/(m K)
N/A

 

N/A
N/A
N/A
N/A
N/A

 

1.000195

 

N/A
4.819 g/cm3
16.385142145673

 

10 GPa
3.7 GPa
8.3 GPa
0.33


 

2 MPa
N/A
736 MPa

 

N/A
N/A
N/A

 

0.52 W/(m K)
N/A

 

Diamagnetic
N/A
-4×10-9
-3.16×10-10
-1.93e-05

 

1.000895

 

3350 m/s

Thermal Properties - Enthalpies and thermodynamics

-219.6 °C
-188.12 °C
144.13 K
N/A

 

0.26 kJ/mol
3.27 kJ/mol
N/A
221 °C
685 °C
1766 K
N/A

 

5.4 kJ/mol
26 kJ/mol
{"N/A", "N/A", "N/A"} J/(kg K)

Regulatory and Health - Health and Safety Parameters and Guidelines

CAS7782-41-4
RTECSLM6475000
2.3
9192
EU231-954-8
0
Oxidizing Agent, Water Reactive
4
4

 

N/A
N/A
CAS7782-49-2
{N/A, RTECSVS7700000, N/A}
{N/A, 6.1, N/A}
"N/A", {2658}, "N/A"
{N/A, N/A, N/A}
{N/A, 0, N/A}
N/ A, N/ A, N/ A
{N/A, 2, N/A}
{N/A, 0, N/A}

 

N/A
N/A